Abstract

The present paper proposes a calculus methodology for the finite length Rayleigh step bearings (3D case), lubricated with greases. In the case of a Rayleigh step bearing, the main problem involved is the presence of the stagnant core of grease into the region of the step. The shape of the stagnant core is obtained by finite element method, applied for solving the Navier-Stokes equations. Once established the dimensions of the stagnant core, the characteristic parameters of the bearing (pressure distribution, load, flow capacity and apparent friction coefficient) will be numerically determined, using the finite differences method.